Don't do dynamic IPv6 probe on Windows...

net/base/net_util.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/base/net_util.h"
 
 #include <algorithm>
 #include <map>
 #include <unicode/ucnv.h>
 #include <unicode/uidna.h>
@@ skipping 1545 matching lines @@
         ports.insert(StringToInt(WideToASCII(
             allowed_ports.substr(last, length))));
       last = i + 1;
     }
   }
   explicitly_allowed_ports = ports;
 }
 
 enum IPv6SupportStatus {
   IPV6_CANNOT_CREATE_SOCKETS,
-  IPV6_CAN_CREATE_SOCKETS,  // Deprecated: No longer used.
+  IPV6_CAN_CREATE_SOCKETS,
   IPV6_GETIFADDRS_FAILED,
   IPV6_GLOBAL_ADDRESS_MISSING,
   IPV6_GLOBAL_ADDRESS_PRESENT,
   IPV6_INTERFACE_ARRAY_TOO_SHORT,
   IPV6_SUPPORT_MAX  // Bounding values for enumeration.
 };
 
 static void IPv6SupportResults(IPv6SupportStatus result) {
   static bool run_once = false;
   if (!run_once) {
@@ skipping 57 matching lines @@
   return true;
 #elif defined(OS_WIN)
   EnsureWinsockInit();
   SOCKET test_socket = socket(AF_INET6, SOCK_STREAM, 0);
   if (test_socket == INVALID_SOCKET) {
     IPv6SupportResults(IPV6_CANNOT_CREATE_SOCKETS);
     return false;
   }
   closesocket(test_socket);
 
+  // TODO(jar): Bug 40851: The remainder of probe is not working.
+  IPv6SupportResults(IPV6_CAN_CREATE_SOCKETS);  // Record status.
+  return true;  // Don't disable IPv6 yet.
+
   // Check to see if any interface has a IPv6 address.
   // Note: The original IPv6 socket can't be used here, as WSAIoctl() will fail.
-  test_socket = WSASocket(AF_INET, SOCK_DGRAM, 0, NULL, 0, 0);
+  test_socket = socket(AF_INET, SOCK_STREAM, 0);
   DCHECK(test_socket != INVALID_SOCKET);
   INTERFACE_INFO interfaces[128];
   DWORD bytes_written = 0;
   int rv = WSAIoctl(test_socket, SIO_GET_INTERFACE_LIST, NULL, 0, interfaces,
                     sizeof(interfaces), &bytes_written, NULL, NULL);
   closesocket(test_socket);
 
   if (0 != rv) {
     if (WSAGetLastError() == WSAEFAULT)
       IPv6SupportResults(IPV6_INTERFACE_ARRAY_TOO_SHORT);
@@ skipping 20 matching lines @@
 
   IPv6SupportResults(IPV6_GLOBAL_ADDRESS_MISSING);
   return false;
 #else
   NOTIMPLEMENTED();
   return true;
 #endif  // defined(various platforms)
 }
 
 }  // namespace net